[INFO] fetching crate rust-research-mcp 0.6.7...
[INFO] testing rust-research-mcp-0.6.7 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate rust-research-mcp 0.6.7 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate rust-research-mcp 0.6.7
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rust-research-mcp 0.6.7
[INFO] tweaked toml for crates.io crate rust-research-mcp 0.6.7 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust-research-mcp 0.6.7 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rust-research-mcp 0.6.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b2141632c5fd9a94664cbeeac3d4ce3a003a6438ed67a20dc9ad40cd9d90a16
[INFO] running `Command { std: "docker" "start" "-a" "4b2141632c5fd9a94664cbeeac3d4ce3a003a6438ed67a20dc9ad40cd9d90a16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b2141632c5fd9a94664cbeeac3d4ce3a003a6438ed67a20dc9ad40cd9d90a16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b2141632c5fd9a94664cbeeac3d4ce3a003a6438ed67a20dc9ad40cd9d90a16", kill_on_drop: false }`
[INFO] [stdout] 4b2141632c5fd9a94664cbeeac3d4ce3a003a6438ed67a20dc9ad40cd9d90a16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b5439282519e2dda8ab7cf98bca819e0ceb5fb6107f0744fe86d3d25dad7e1f
[INFO] running `Command { std: "docker" "start" "-a" "7b5439282519e2dda8ab7cf98bca819e0ceb5fb6107f0744fe86d3d25dad7e1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling cc v1.2.33
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling hashbrown v0.15.5
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling thiserror v2.0.16
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling serde_json v1.0.143
[INFO] [stderr]    Compiling deranged v0.4.0
[INFO] [stderr]    Compiling time-core v0.1.4
[INFO] [stderr]    Compiling num_threads v0.1.7
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling ucd-trie v0.1.7
[INFO] [stderr]    Compiling indexmap v2.10.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling allocator-api2 v0.2.21
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]    Compiling anyhow v1.0.99
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling futf v0.1.5
[INFO] [stderr]    Compiling vergen v8.3.2
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling instant v0.1.13
[INFO] [stderr]    Compiling dtoa v1.0.10
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling ref-cast v1.0.24
[INFO] [stderr]    Compiling iana-time-zone v0.1.63
[INFO] [stderr]    Compiling dtoa-short v0.3.5
[INFO] [stderr]    Compiling tendril v0.4.3
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling winnow v0.7.12
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling anstream v0.6.20
[INFO] [stderr]    Compiling phf v0.10.1
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling flate2 v1.1.2
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling time v0.3.41
[INFO] [stderr]    Compiling servo_arc v0.3.0
[INFO] [stderr]    Compiling nix v0.29.0
[INFO] [stderr]    Compiling arraydeque v0.5.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling const-random-macro v0.1.16
[INFO] [stderr]    Compiling option-ext v0.2.0
[INFO] [stderr]    Compiling unicode-width v0.2.1
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling clap_lex v0.7.5
[INFO] [stderr]    Compiling dyn-clone v1.0.20
[INFO] [stderr]    Compiling signal-hook-registry v1.4.6
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling openssl-sys v0.9.109
[INFO] [stderr]    Compiling parking_lot v0.12.4
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling const-random v0.1.18
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling openssl v0.10.73
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]    Compiling dlv-list v0.5.2
[INFO] [stderr]    Compiling uuid v1.18.0
[INFO] [stderr]    Compiling signal-hook v0.3.18
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling phf_generator v0.10.0
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling string_cache_codegen v0.5.4
[INFO] [stderr]    Compiling phf_codegen v0.11.3
[INFO] [stderr]    Compiling phf_codegen v0.10.0
[INFO] [stderr]    Compiling selectors v0.25.0
[INFO] [stderr]    Compiling ordered-multimap v0.7.3
[INFO] [stderr]    Compiling hashlink v0.8.4
[INFO] [stderr]    Compiling markup5ever v0.12.1
[INFO] [stderr]    Compiling clap_builder v4.5.44
[INFO] [stderr]    Compiling rust-ini v0.20.0
[INFO] [stderr]    Compiling getopts v0.2.23
[INFO] [stderr]    Compiling yaml-rust2 v0.8.1
[INFO] [stderr]    Compiling hostname v0.4.1
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling dirs-sys v0.4.1
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling md-5 v0.10.6
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling thread_local v1.1.9
[INFO] [stderr]    Compiling weezl v0.1.10
[INFO] [stderr]    Compiling rangemap v1.6.0
[INFO] [stderr]    Compiling ego-tree v0.6.3
[INFO] [stderr]    Compiling nu-ansi-term v0.50.1
[INFO] [stderr]    Compiling matchit v0.7.3
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling syslog v7.0.0
[INFO] [stderr]    Compiling rust-research-mcp v0.6.7 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling dirs v5.0.1
[INFO] [stderr]    Compiling sled v0.34.7
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling darling_core v0.21.2
[INFO] [stderr]    Compiling serde_derive_internals v0.29.1
[INFO] [stderr]    Compiling backoff v0.4.0
[INFO] [stderr]    Compiling daemonize v0.5.0
[INFO] [stderr] warning: rust-research-mcp@0.6.7: not within a suitable 'git' worktree!
[INFO] [stderr] warning: rust-research-mcp@0.6.7: VERGEN_GIT_BRANCH set to default
[INFO] [stderr] warning: rust-research-mcp@0.6.7: VERGEN_GIT_COMMIT_DATE set to default
[INFO] [stderr] warning: rust-research-mcp@0.6.7: VERGEN_GIT_COMMIT_TIMESTAMP set to default
[INFO] [stderr] warning: rust-research-mcp@0.6.7: VERGEN_GIT_SHA set to default
[INFO] [stderr] warning: rust-research-mcp@0.6.7: VERGEN_GIT_DIRTY set to default
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling urlencoding v2.1.3
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling yoke-derive v0.8.0
[INFO] [stderr]    Compiling zerovec-derive v0.11.1
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling thiserror-impl v2.0.16
[INFO] [stderr]    Compiling phf_macros v0.11.3
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling phf v0.11.3
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling ref-cast-impl v1.0.24
[INFO] [stderr]    Compiling html5ever v0.27.0
[INFO] [stderr]    Compiling cssparser-macros v0.6.1
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling cssparser v0.31.2
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling yoke v0.8.0
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling sct v0.7.1
[INFO] [stderr]    Compiling zerovec v0.11.4
[INFO] [stderr]    Compiling zerotrie v0.2.2
[INFO] [stderr]    Compiling pest v2.8.1
[INFO] [stderr]    Compiling rustls-webpki v0.101.7
[INFO] [stderr]    Compiling schemars_derive v1.0.4
[INFO] [stderr] error: could not compile `regex-automata` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-10-28-x86_64-unknown-linux-gnu/bin/rustc --crate-name regex_automata --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/regex-automata-0.4.9/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="dfa-build"' --cfg 'feature="dfa-onepass"' --cfg 'feature="dfa-search"' --cfg 'feature="hybrid"' --cfg 'feature="meta"' --cfg 'feature="nfa-backtrack"' --cfg 'feature="nfa-pikevm"' --cfg 'feature="nfa-thompson"' --cfg 'feature="perf-inline"' --cfg 'feature="perf-literal"' --cfg 'feature="perf-literal-multisubstring"' --cfg 'feature="perf-literal-substring"' --cfg 'feature="std"' --cfg 'feature="syntax"' --cfg 'feature="unicode"' --cfg 'feature="unicode-age"' --cfg 'feature="unicode-bool"' --cfg 'feature="unicode-case"' --cfg 'feature="unicode-gencat"' --cfg 'feature="unicode-perl"' --cfg 'feature="unicode-script"' --cfg 'feature="unicode-segment"' --cfg 'feature="unicode-word-boundary"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("alloc", "default", "dfa", "dfa-build", "dfa-onepass", "dfa-search", "hybrid", "internal-instrument", "internal-instrument-pikevm", "logging", "meta", "nfa", "nfa-backtrack", "nfa-pikevm", "nfa-thompson", "perf", "perf-inline", "perf-literal", "perf-literal-multisubstring", "perf-literal-substring", "std", "syntax", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment", "unicode-word-boundary"))' -C metadata=6817cdc701378558 -C extra-filename=-a0486f926e8db391 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern aho_corasick=/opt/rustwide/target/debug/deps/libaho_corasick-784389ac50f1509c.rmeta --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-eb753e192a6bbd2d.rmeta --extern regex_syntax=/opt/rustwide/target/debug/deps/libregex_syntax-cf9ef9729ec61e4c.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7b5439282519e2dda8ab7cf98bca819e0ceb5fb6107f0744fe86d3d25dad7e1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b5439282519e2dda8ab7cf98bca819e0ceb5fb6107f0744fe86d3d25dad7e1f", kill_on_drop: false }`
[INFO] [stdout] 7b5439282519e2dda8ab7cf98bca819e0ceb5fb6107f0744fe86d3d25dad7e1f